Lazy and cheap!!?? I guess I cant argue with that!
Issues that will arise...
As already stated.. Cross comb.. If your OK with fixing cross comb its not so bad, but its wasted effort for the bees and you so it can get annoying.
Deep drawn comb.. This can happen with foundation or with foundation less.. rather than build new comb in the empty frame, they draw the opposing frame deeper. Not as much of a problem in the brood area, but a big problem in honey supers. They may still pull out the outer ring wher ehtey store honey and pollen in the brood area.
To fix cross comb, it needs to be cut out, and or re glued/waxed correctly in a frame and they will fix it up from there.
To fix the deeper drawn comb, there is little option but to shave it back, and that can get ugly if they have honey in it already.
When i start a "new" box that needs drawn, I use two foundation less, one with foundation, two foundation less, one with foundation, etc... and you will end up with a single on the outside wall. But it means you can use three pieces of foundation instead of ten.. If they decide to cross comb it, the mess is limited to the four frames and easier to fix. Checking every week in the spring usually means I catch it while still attaching to only the two foundation less frames.
I have a few hives I know I can drop an entire box of foundation less frames on, and they will start it straight, and I have hives that I run every other frame because I KNOW they are going to make a mess.
Rotating frames through your hive, and dropping in foundation less one or two at a time in the brood chamber works the best if you have the patience. Shaving/fixing a frame with brood in it, even just eggs has a tendency to put the bees into war mode, so thats something else you need to be ready for.
It all comes down to what you consider your time and effort to be worth. If your as cheap as I am, fixing messes is less painful than buying foundation.